Miniaturized planar antenna with NANOMET powder cores for the VHF band application

In this paper, we present a meander line microstrip antenna with the NANOMET powder core (NPC) on the top of the antenna, thus essentially creating a magneto-dielectric substrate/superstrate for practical applications. X-ray diffraction (XRD) with Cu-Kα radiation was used to explore on nano-crystalline structure of the NANOMET powder core. The hysteresis loop of the NPC was measured with a vibrating sample magnetometer (VSM). The micrographs of the NANOMET powder and phenol resin can be observed in Fig . 1 . As shown in Fig . 1, a large frequency shift of the central resonant frequency of 10 MHz ~ 60 MHz and an enhanced bandwidth were obtained for the designed magnetic meander line antennas over the non-magnetic counterparts at 300 MHz, which shows great potential for applications in VHF band wireless communication systems.